Evidence for the formation of Mn2(CO)9(CS)

Article abstract of DOI:10.1021/om00117a050

The reaction of [Mn(CO)₅]^- with SCCl₂ in pentane at room temperature produces minor amounts of a mixture of Mn₂(CO)₉CS and Mn₂(CO)₁₀, isolated from the solution. The main reaction product, which is insoluble in pentane, consists of a CO- and Cl-containing ionic material. In the presence of 18-crown-6, [K(18-crown-6)][Mn(CO)₄Cl₂] is formed exclusively. The thiocarbonyl derivative, which could not be separated from Mn₂(CO)₁₀, was identified and characterized by mass, IR, and ⁵⁵Mn NMR spectroscopic methods, which also showed that Mn₂(CO)₉CS exists as a mixture of the cis and trans isomers. Further, the formation of Mn₂(CO)₉CS was demonstrated by reactions with PPh₃ and Br₂.